1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // UNSUPPORTED: c++03, c++11, c++14, c++17
10
11 // class std::ranges::lazy_split_view;
12
13 #include <ranges>
14
15 #include <cassert>
16 #include <concepts>
17 #include <string_view>
18 #include <type_traits>
19 #include "types.h"
20
21 using V = SplitViewForward;
22
23 static_assert(std::is_base_of_v<std::ranges::view_interface<SplitViewForward>, SplitViewForward>);
24
test()25 constexpr bool test() {
26 using namespace std::string_view_literals;
27
28 // empty()
29 {
30 {
31 std::ranges::lazy_split_view v("abc def", " ");
32 assert(!v.empty());
33 }
34
35 {
36 // Note: an empty string literal would still produce a non-empty output because the terminating zero is treated as
37 // a separate character; hence the use of `string_view`.
38 std::ranges::lazy_split_view v(""sv, "");
39 assert(v.empty());
40 }
41 }
42
43 // operator bool()
44 {
45 {
46 std::ranges::lazy_split_view v("abc", "");
47 assert(v);
48 }
49
50 {
51 // Note: an empty string literal would still produce a non-empty output because the terminating zero is treated as
52 // a separate character; hence the use of `string_view`.
53 std::ranges::lazy_split_view v(""sv, "");
54 assert(!v);
55 }
56 }
57
58 // front()
59 {
60 SplitViewForward v("abc", "");
61 assert(*(v.front()).begin() == 'a');
62 }
63
64 return true;
65 }
66
main(int,char **)67 int main(int, char**) {
68 test();
69 static_assert(test());
70
71 return 0;
72 }
73